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<span style='color:#800000; font-weight:bold; '>Private</span> <span style='color:#800000; font-weight:bold; '>Sub</span> convertToPdfButton_Click<span style='color:#808030; '>(</span><span style='color:#800000; font-weight:bold; '>ByVal</span> sender <span style='color:#800000; font-weight:bold; '>As</span> <span style='color:#800000; font-weight:bold; '>Object</span><span style='color:#808030; '>,</span> <span style='color:#800000; font-weight:bold; '>ByVal</span> e <span style='color:#800000; font-weight:bold; '>As</span> EventArgs<span style='color:#808030; '>)</span> <span style='color:#800000; font-weight:bold; '>Handles</span> convertToPdfButton<span style='color:#008c00; '>.</span>Click
    <span style='color:#696969; '>' Create a HTML to PDF converter object with default settings</span>
    <span style='color:#800000; font-weight:bold; '>Dim</span> htmlToPdfConverter <span style='color:#800000; font-weight:bold; '>As</span> <span style='color:#800000; font-weight:bold; '>New</span> HtmlToPdfConverter<span style='color:#808030; '>(</span><span style='color:#808030; '>)</span>

    <span style='color:#696969; '>' Set license key received after purchase to use the converter in licensed mode</span>
    <span style='color:#696969; '>' Leave it not set to use the converter in demo mode</span>
    htmlToPdfConverter<span style='color:#008c00; '>.</span>LicenseKey <span style='color:#808030; '>=</span> <span style='color:#0000e6; '>"4W9+bn19bn5ue2B+bn1/YH98YHd3d3c="</span>

    <span style='color:#696969; '>' Set an adddional delay in seconds to wait for JavaScript or AJAX calls after page load completed</span>
    <span style='color:#696969; '>' Set this property to 0 if you don't need to wait for such asynchcronous operations to finish</span>
    htmlToPdfConverter<span style='color:#008c00; '>.</span>ConversionDelay <span style='color:#808030; '>=</span> <span style='color:#008c00; '>2</span>

    <span style='color:#696969; '>' Set the PDF file to be inserted before conversion result</span>
    htmlToPdfConverter<span style='color:#008c00; '>.</span>PdfDocumentOptions<span style='color:#008c00; '>.</span>AddStartDocument<span style='color:#808030; '>(</span>pdfBeforeTextBox<span style='color:#008c00; '>.</span><span style='color:#800000; font-weight:bold; '>Text</span><span style='color:#808030; '>)</span>

    <span style='color:#696969; '>' Set the PDF file to be added after conversion result</span>
    htmlToPdfConverter<span style='color:#008c00; '>.</span>PdfDocumentOptions<span style='color:#008c00; '>.</span>AddEndDocument<span style='color:#808030; '>(</span>pdfAfterTextBox<span style='color:#008c00; '>.</span><span style='color:#800000; font-weight:bold; '>Text</span><span style='color:#808030; '>)</span>

    Cursor <span style='color:#808030; '>=</span> Cursors<span style='color:#008c00; '>.</span>WaitCursor

    <span style='color:#800000; font-weight:bold; '>Dim</span> outPdfFile <span style='color:#800000; font-weight:bold; '>As</span> <span style='color:#800000; font-weight:bold; '>String</span> <span style='color:#808030; '>=</span> <span style='color:#0000e6; '>"DemoAppFiles\Output\HTML_to_PDF\Merge_HTML_with_Existing_PDF.pdf"</span>
    <span style='color:#800000; font-weight:bold; '>Try</span>
        <span style='color:#696969; '>' The URL to convert</span>
        <span style='color:#800000; font-weight:bold; '>Dim</span> url <span style='color:#800000; font-weight:bold; '>As</span> <span style='color:#800000; font-weight:bold; '>String</span> <span style='color:#808030; '>=</span> urlTextBox<span style='color:#008c00; '>.</span><span style='color:#800000; font-weight:bold; '>Text</span>

        <span style='color:#696969; '>' Convert the HTML page to a PDF document and add the external PDF documents</span>
        <span style='color:#800000; font-weight:bold; '>Dim</span> outPdfBuffer<span style='color:#808030; '>(</span><span style='color:#808030; '>)</span> <span style='color:#800000; font-weight:bold; '>As</span> <span style='color:#800000; font-weight:bold; '>Byte</span> <span style='color:#808030; '>=</span> htmlToPdfConverter<span style='color:#008c00; '>.</span>ConvertUrl<span style='color:#808030; '>(</span>url<span style='color:#808030; '>)</span>

        <span style='color:#696969; '>' Write the memory buffer in a PDF file</span>
        <span style='color:#800000; font-weight:bold; '>System</span><span style='color:#008c00; '>.</span>IO<span style='color:#008c00; '>.</span>File<span style='color:#008c00; '>.</span>WriteAllBytes<span style='color:#808030; '>(</span>outPdfFile<span style='color:#808030; '>,</span> outPdfBuffer<span style='color:#808030; '>)</span>
    <span style='color:#800000; font-weight:bold; '>Catch</span> ex <span style='color:#800000; font-weight:bold; '>As</span> Exception
        <span style='color:#696969; '>' The HTML to PDF conversion failed</span>
        MessageBox<span style='color:#008c00; '>.</span>Show<span style='color:#808030; '>(</span><span style='color:#800000; font-weight:bold; '>String</span><span style='color:#008c00; '>.</span><span style='color:#800000; font-weight:bold; '>Format</span><span style='color:#808030; '>(</span><span style='color:#0000e6; '>"HTML to PDF Error. {0}"</span><span style='color:#808030; '>,</span> ex<span style='color:#008c00; '>.</span>Message<span style='color:#808030; '>)</span><span style='color:#808030; '>)</span>
        <span style='color:#800000; font-weight:bold; '>Return</span>
    <span style='color:#800000; font-weight:bold; '>Finally</span>
        Cursor <span style='color:#808030; '>=</span> Cursors<span style='color:#008c00; '>.</span>Arrow
    <span style='color:#800000; font-weight:bold; '>End</span> <span style='color:#800000; font-weight:bold; '>Try</span>

    <span style='color:#696969; '>' Open the created PDF document in default PDF viewer</span>
    <span style='color:#800000; font-weight:bold; '>Try</span>
        Process<span style='color:#008c00; '>.</span>Start<span style='color:#808030; '>(</span>outPdfFile<span style='color:#808030; '>)</span>
    <span style='color:#800000; font-weight:bold; '>Catch</span> ex <span style='color:#800000; font-weight:bold; '>As</span> Exception
        MessageBox<span style='color:#008c00; '>.</span>Show<span style='color:#808030; '>(</span><span style='color:#800000; font-weight:bold; '>String</span><span style='color:#008c00; '>.</span><span style='color:#800000; font-weight:bold; '>Format</span><span style='color:#808030; '>(</span><span style='color:#0000e6; '>"Cannot open created PDF file '{0}'. {1}"</span><span style='color:#808030; '>,</span> outPdfFile<span style='color:#808030; '>,</span> ex<span style='color:#008c00; '>.</span>Message<span style='color:#808030; '>)</span><span style='color:#808030; '>)</span>
    <span style='color:#800000; font-weight:bold; '>End</span> <span style='color:#800000; font-weight:bold; '>Try</span>
<span style='color:#800000; font-weight:bold; '>End</span> <span style='color:#800000; font-weight:bold; '>Sub</span>
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